CVE-2026-8496

NameCVE-2026-8496
DescriptionA cross-site scripting (XSS) vulnerability exists in Alinto SOGo, version 5.12.7. A maliciously crafted ICS calendar invitation files allows arbitrary JavaScript execution within the authenticated SOGo webmail session. The issue occurs because SVG content embedded in the description field of an ICS file, with an onrepeat event handler, is insufficiently sanitized before being rendered in the webmail interface. A remote attacker can execute JavaScript in the victim's browser when the malicious calendar invite is viewed. Successful exploitation may allow mailbox access, email and contact theft, session hijacking, and other actions allowed by an authenticated user.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-4657-1, DSA-6366-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
sogo (PTS)bullseye5.0.1-4+deb11u1vulnerable
bullseye (security)5.0.1-4+deb11u3vulnerable
bookworm, bookworm (security)5.8.0-2+deb12u3fixed
trixie (security), trixie5.12.1-3+deb13u2fixed
forky, sid5.12.9-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
sogosourcebookworm5.8.0-2+deb12u3DLA-4657-1
sogosourcetrixie5.12.1-3+deb13u2DSA-6366-1
sogosource(unstable)5.12.8-1

Notes

[bullseye] - sogo <ignored> (Invasive to patch; Debian maintainer recommends against backport)
https://github.com/Alinto/sogo/commit/67ce01ec2a1a7854d8e9f615dd65afb949043e8 (SOGo-5.12.8)

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